Malicious Office (OLE) / .DOCX — malware analysis report

Static analysis result for SHA-256 6093c4cfb002d365…

MALICIOUS

Office (OLE) / .DOCX

158.9 KB Created: 2020-09-23 21:57:00 Authoring application: Microsoft Office Word
MD5: 3254c1834e226bd9f83710986281e875 SHA-1: 49cc71cb76d497221b9cc64d00e4c62ed81f14e5 SHA-256: 6093c4cfb002d365f8ed7749c339b75a92ae859f23a5989378d8096481daa5ca
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The sample is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that executes automatically. Heuristics indicate the use of CreateObject, a common technique for downloading and executing payloads. The ClamAV detection name 'Doc.Downloader' further supports this. No specific URLs or executable content were directly extracted, but the macro's intent is clearly to download and run a secondary payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Mryv-9765643-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Mryv-9765643-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
d7dd2a73d7d39dc729b85cfde71706f8b2534ea5cd633d43e9c623fb8097a814		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20294 bytes

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